kamaDuplicating the Ca Setup for Different Mesh对联100副欣赏
Purpo: This document provides guidance for duplicating a FLUENT ca tup when moving from one mesh to another. Different methods for achieving this goal are discusd. Tips for converging the new ca are also shared.
I ntroduction
On many occasions, it is necessary to replace the grid while retaining all of the ttings for the ca. It can be tiresome to start by reading a new mesh file and then duplicating the ca tup by specifying ttings through the GUI . In addition, there is always a chance for making an error when specifying the new ca file tup. FLUENT offers two methods that can be ud to simplify this process. It is also possible to u the earlier converged solution as an initial guess for the new CFD run.
Procedure
Starting with the old Gambit databa, or otherwi, generate a new mesh with the necessary modifications.
Make sure that the names of the boundaries are identical with tho in the existing FLUENT ca.
怎么设置路由器wifi设置教程
Method-1
1. Start FLUENT and read the old ca file which will be duplicated.
2. Type the following scheme command in the FLUENT console window:
> (reread-grid “newmeshfilename”)
In place of newmeshfilename, enter the name of the .msh file to be ud. For example,
(reread-grid “fine.msh”)
Note: Do not miss the opening and closing parenthes, or the quotation marks before and after the name of the mesh file. It is also possible to read the mesh file in .gz form.
3. Save the ca file and exit the FLUENT ssion.
Method-2
1. Start FLUENT and read the ca file which will be duplicated. Write a file called BC that contains all of
the ca tup information. This can be achieved by entering the following text ur interface (TUI) command:
file/write-bc/bcfilename
In place of bcfilename, enter the name of the file to be written. For example, file/write-bc/tup.bc.For detailed information about TUI commands, plea refer to TUI commands.
2. Start FLUENT again, read in the new mesh file, and enter the following command to read in the BC file:
file/read-bc/bcfilename
3. Save the ca file and exit the FLUENT ssion.
Now, the ca file with the new mesh is ready for iteration.墨鱼干
4. Start FLUENT and read the recently saved ca file.
5. To initialize the ca, or interpolate the results from an earlier simulation, do the following:
(a) Read the earlier ca and data file.
(b) Write out an interpolation file using the FileÆ Interpolate menu.
宪法制定
B族维生素功效(c) Read the new ca and interpolate the earlier results using the Read option in the File Æ
Interpolate menu.
The ur has the freedom to lect cell zones as well as the variables of interest while writing the interpolation file. For details about the interpolation process, plea refer to:
Interpolation steps
Tips/Troubleshooting
• The BC files can be version specific. Hence, it is highly recommended to u BC files only within a single version of FLUENT. For example, a BC file written with an older FLUENT version (say FLUENT 6.0.20) may not work with a newer version (FLUENT 6.2.16).
• If the boundary zones do not have the exact same names as in the BC file, they may be ignored an
d t to default values during the ca tup. In such a circumstance, manual ttings will be required.
• The name BC file is somewhat misleading. BC files record the entire ca tup. In addition to the boundary condition ttings, a BC file also contains information about solver ttings, values for under relaxation factors, definitions of custom field functions, ttings for the monitors to be applied, etc.
• The grid will not be scaled by using any of the steps mentioned here. Hence, check grid scaling after using this prescribed approach for ca tup.
• Interpolating the results from an earlier ca and data file may not always help with convergence. If the earlier results were not fully converged, or if they are highly unphysical, it is recommended to initialize the new ca using standard procedures.
蝈
Product Version:Fluent 6.X onwards
Authors:Amarvir Chilka and Ashish Kulkarni
>柳州龙潭
